Big refactoring#13

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chvanikoff wants to merge 18 commits intohassox:masterfrom

chvanikoff:refactoring

Commits on May 14, 2017

Relaxed Poison dependency to allow 2.0
chvanikoff
committed

Commits on May 15, 2017

Added check if incoming message in StdJsonIo is from Worker
chvanikoff
committed

Commits on May 16, 2017